Checking Non-free package installed in your Ubuntu with VRMS

If you want to know what are non-free software installed in your computer in an easy way, you can use vrms. It analyzes the currently-installed package list and reports the non-free packages that are currently installed to stdout.

Vrms was written by Bdale Garbee and Bill Geddes for the Debian GNU/Linux system, in response to an open discussion with Richard Stallman about the issues surrounding the availability/desirability of the ’non-free’ package tree in Debian. So, any software that fail to meet the terms of the Debian Free Software Guidelines included as part of the Debian Social Contract will be displayed in its report.